WO2015105381A1 - Dispositif électroluminescent organique et appareil d'éclairage comportant ce dernier - Google Patents

Dispositif électroluminescent organique et appareil d'éclairage comportant ce dernier Download PDF

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WO2015105381A1
WO2015105381A1 PCT/KR2015/000251 KR2015000251W WO2015105381A1 WO 2015105381 A1 WO2015105381 A1 WO 2015105381A1 KR 2015000251 W KR2015000251 W KR 2015000251W WO 2015105381 A1 WO2015105381 A1 WO 2015105381A1
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light emitting
emitting material
layer
organic
green
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PCT/KR2015/000251
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English (en)
Korean (ko)
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박민춘
이재인
문제민
유진아
김옥근
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주식회사 엘지화학
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Priority to US15/110,550 priority Critical patent/US9887376B2/en
Priority to CN201580004058.6A priority patent/CN105900256B/zh
Priority to EP15735498.6A priority patent/EP3093897B1/fr
Publication of WO2015105381A1 publication Critical patent/WO2015105381A1/fr

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/10—Triplet emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers

Definitions

  • the present specification relates to an organic light emitting device and a lighting device including the same.
  • organic light emitting device illumination in order to achieve a high color rendering index, it is preferable to be similar to the SPD (spectral power distribution) of the standard light source.
  • SPD spectral power distribution
  • Conventional organic light emitting device illumination generally uses red (R), green (G) and blue (B) light emitting materials, but the emission is relatively low between the light emission peaks of green (G) and blue (B).
  • CRI color rendering index
  • an organic light emitting device capable of providing white light having improved color rendering index (CRI) characteristics and a lighting device including the same.
  • An organic light emitting device comprising a first electrode, a second electrode, and one or more organic material layers provided between the first electrode and the second electrode.
  • At least one layer of the organic material layer is a light emitting layer including a first light emitting material and a second light emitting material
  • An organic light emitting device is characterized in that a maximum emission peak wavelength ⁇ max of a second light emitting material has a gap of 40 to 80 nm compared to the maximum emission peak wavelength ⁇ max of the first light emitting material.
  • the light emitting layer comprising the first light emitting material and the second light emitting material further comprises an additional light emitting layer.
  • the organic light emitting diode is a white organic light emitting diode.
  • Another embodiment of the present specification provides an illumination device including the organic light emitting device or the white organic light emitting device.
  • the blue green light emitting material together with the blue light emitting material, it is possible to implement a light emission wavelength similar to the SPD of the standard light source, thereby improving the color rendering index.
  • a blue light emitting material and a blue green light emitting material as described above, as compared with the case of using a single light emitting material, with the implementation of the desired light emission wavelength, the efficiency and / or life of the device is improved depending on the selection of the light emitting material You can expect even.
  • FIG. 1 illustrates a conventional white organic light emitting device including a blue light emitting material, a green light emitting material, and a red light emitting material, together with a blue light emitting material, a blue green light emitting material, a green light emitting material, and a red light emitting material according to one embodiment of the present specification. It compares the emission wavelength which can be implement
  • FIG. 2 is a schematic of the light emission mechanism in a light emitting layer comprising a fluorescent host, a fluorescent blue dopant and a fluorescent blue green dopant.
  • FIG 3 illustrates a laminated structure of an organic light emitting diode according to an exemplary embodiment of the present specification.
  • 4 and 5 illustrate emission wavelengths of the organic light emitting device including the single light emitting layer, respectively, when a material having a lambda max of 515 nm and a material having a lambda max of 500 nm are used as the blue-green fluorescent dopant.
  • An exemplary embodiment of the present specification provides an organic light emitting device including a first electrode, a second electrode, and one or more organic material layers provided between the first electrode and the second electrode, wherein at least one of the organic material layers is a first electrode.
  • a light emitting layer including a light emitting material and a second light emitting material, and the maximum light emission peak wavelength ( ⁇ max) of the second light emitting material is compared to the maximum light emission peak wavelength ( ⁇ max) of the first light emitting material to form a gap of 40 ⁇ 80nm It is characterized by having.
  • the first light emitting material may be a blue light emitting material
  • the second light emitting material may be a bluish green light emitting material
  • a light emitting layer including a blue green light emitting material together with a blue light emitting material is formed.
  • blue green emits light upon receiving blue energy, it is not necessary to stack another layer, thereby simplifying the process. In other words, it is not necessary to use two layers of blue and blue green to increase the color rendering index (CRI).
  • CRI color rendering index
  • the life of the blue-green light emitting material is better than the life of the blue light emitting material, it helps to improve the life.
  • both fluorescent blue and blue green have high energy, when the light emitting layers of each color are stacked, the voltage rise is large, and the efficiency that can be obtained in comparison with the voltage rise. This is not high.
  • color rendition is caused by the characteristics of three elements of color, that is, a color sample (object), a light source, and a light source among eyes, and the same color sample shows a phenomenon in which colors look different according to the characteristics of the light source.
  • a color sample object
  • a light source a light source among eyes
  • the same color sample shows a phenomenon in which colors look different according to the characteristics of the light source.
  • the color of clothes that looked beautiful in the open air and dying under fluorescent light are examples of color rendering that we can easily encounter.
  • the color temperature is similar to that of natural light
  • the spectral distribution is very different from that of natural light. Therefore, this color rendering of the light source is evaluated based on the spectral distribution of daylight and planckian radiator.
  • a white organic light emitting device including a first electrode, a second electrode and one or more organic material layers provided between the first electrode and the second electrode, wherein the first electrode and the A blue light emitting material between the second electrodes; Bluish green luminescent material; Red light emitting material; And it provides a white organic light emitting device comprising at least one of a green light emitting material and a yellow light emitting material.
  • the white organic light emitting element includes a blue light emitting material, a blue green light emitting material, a green light emitting material, and a red light emitting material; Blue luminescent material, bluish green luminescent material, yellow luminescent material, and red luminescent material; Blue light emitting material, blue green light emitting material, green light emitting material, yellow light emitting material, and red light emitting material.
  • the maximum light emission wavelength of the green light emitting material is about 545 nm
  • the maximum light emission wavelength of the yellow light emitting material is about 560 nm
  • the maximum light emission wavelength of the red light emitting material is about 610 nm.
  • FIG. 1 illustrates a conventional white organic light emitting device including a blue light emitting material, a green light emitting material, and a red light emitting material, together with a blue light emitting material, a blue green light emitting material, a green light emitting material, and a red light emitting material according to one embodiment of the present specification. It compares the emission wavelength which can be implement
  • FIG. 1 in the organic light emitting diode according to the related art, since light emission around 500 nm between blue and green is weak, there is a limit in improving the color rendering index (CRI) level, but the blue light emitting material and the blue green color according to the exemplary embodiment of the present specification. When the light emitting material is used together, light emission around 500 nm is compensated for, thereby achieving a level similar to that of a SPD of a standard light source.
  • CRI color rendering index
  • the maximum emission peak wavelength ( ⁇ max) of the second light emitting material has a gap of 40 ⁇ 80nm compared to the maximum emission peak wavelength ( ⁇ max) of the first light emitting material. It can exhibit a better effect.
  • the bluish green light emitting material is a light emitting material having a maximum emission peak wavelength ⁇ max of more than 500 nm and 550 nm or less.
  • the bluish green light emitting material is a light emitting material having a maximum emission peak wavelength ⁇ max of 505 nm or more and 530 nm or less.
  • the bluish green light emitting material is a light emitting material having a maximum emission peak wavelength ⁇ max of 515 nm.
  • the light emitting layer includes a light emitting host and a light emitting dopant.
  • the light emitting dopant may include the first light emitting material and the second light emitting material.
  • the first light emitting material may be a blue light emitting dopant
  • the second light emitting material may be a blue green light emitting dopant.
  • the light emitting host is a material that serves to help the light emitting dopant emit light by transferring excitation energy formed by combining holes and electrons received from the first electrode and the second electrode to the light emitting dopant.
  • the light emitting layer includes a fluorescent light emitting host and a fluorescent light emitting dopant.
  • the fluorescent dopant may include the first light emitting material and the second light emitting material.
  • the first light emitting material may be a blue light emitting dopant
  • the second light emitting material may be a blue green light emitting dopant.
  • the blue light emitting dopant is excited by receiving excitation energy from the light emitting host, and is a material that emits blue light while being converted from the excited state to the ground state.
  • the blue green light emitting dopant is excited by receiving excitation energy from the light emitting host and / or the blue light emitting dopant, and converts from the excited state to the ground state and emits blue green light.
  • the S1 level of the blue green light emitting dopant is lower than the S1 level of the blue light emitting dopant
  • the S1 level of the blue light emitting dopant is lower than the S1 level of the light emitting host.
  • S1 is an excitation level at which the fluorescent material has an emission spectrum
  • T1 is an excitation level at which the phosphor has an emission spectrum.
  • the concentration of the blue green light emitting dopant is lower than that of the blue light emitting dopant.
  • the content of the blue-green light emitting dopant is lower than that of the blue light-emitting dopant, thereby minimizing the reduction of the blue light emission intensity by the blue light-emitting dopant.
  • the doping concentration of the blue green light emitting dopant may occur.
  • the content of the blue light emitting dopant in the light emitting layer including the light emitting host, the blue light emitting dopant and the blue green light emitting dopant is 2 to 10% by weight, the content of the blue green light emitting dopant is less than 1% by weight.
  • the content of the blue-green light emitting dopant may be 0.01 wt% to less than 1 wt%.
  • the content of the bluish green light emitting dopant may be 0.01 wt% to 5 wt%.
  • the blue light emitting dopant and the blue green light emitting dopant are co-deposited on the fluorescent light emitting layer of the organic light emitting device, and energy transfer may be performed from the high energy blue light emitting dopant to the blue green light emitting dopant.
  • energy transfer may be performed from the high energy blue light emitting dopant to the blue green light emitting dopant.
  • the blue light emission that must exist is very small and the blue green light emission is greatly expressed.
  • the difference between the maximum emission peak wavelength [lambda] max of the blue light emitting dopant and the maximum emission peak wavelength [lambda] max of the blue-green light emitting dopant is small, for example, when the maximum emission peak wavelength [lambda] max of the blue light emitting dopant is 500 nm, The problem of greatly lowering the color temperature of the light emitting device may occur.
  • doping a small amount of blue-green light emitting dopant the blue light emission is greatly reduced, which may cause a problem of poor productivity.
  • the maximum emission peak wavelength ⁇ max of the second light emitting material has a gap of 40 to 80 nm compared to the maximum emission peak wavelength ⁇ max of the first light emitting material, thereby reducing the emission of blue light. While being smaller, it is possible to maintain the color temperature of the organic light emitting device and to improve the color rendering index.
  • the first light emitting material may be a blue light emitting dopant
  • the second light emitting material may be a blue green light emitting dopant.
  • materials known in the art may be used as the light emitting host, the blue light emitting dopant, and the blue green light emitting dopant, and for example, materials having the following energy levels may be used.
  • Cyan-green luminescent dopant HOMO 5.3eV / LUMO 2.8eV
  • the thickness of the light emitting layer including the above-described first light emitting material and the second light emitting material is not particularly limited, but may be, for example, 200 to 500 mW, and may be formed to about 300 mW as a specific example. Can be.
  • the light emitting layer may be configured through vacuum thermal evaporation.
  • the organic light emitting diode according to the exemplary embodiment of the present specification further includes one or more light emitting layers of the first light emitting material and the second light emitting material in addition to the light emitting layer.
  • the number of emitting layers is not particularly limited, and two, three, or four or more emitting layers may be included.
  • the stacking order of the first light emitting layer and the second light emitting layer is not limited.
  • the first light emitting layer may be disposed closer to the first electrode than the second light emitting layer, or may be disposed closer to the second electrode. The inventors have found that the color rendering index is improved when two layers of the light emitting layer are laminated as described above.
  • the organic light emitting diode is provided between the first electrode and the second electrode, and includes a green light emitting material and a red light emitting material, or includes a green light emitting material and a yellow light emitting material.
  • the first light emitting layer is a phosphorescent light emitting layer
  • the second light emitting layer is a fluorescent light emitting layer.
  • the organic light emitting device is a first electrode; Second electrode; And a first light emitting layer including at least one of a blue light emitting material, a green light emitting material, a yellow light emitting material, and a red light emitting material provided between the first electrode and the second electrode.
  • a second light emitting layer including a blue light emitting material and a blue green light emitting material;
  • a third light emitting layer including at least one of a blue light emitting material, a green light emitting material, a yellow light emitting material, and a red light emitting material.
  • CRI color rendering index
  • the stacking order of the first light emitting layer, the second light emitting layer, and the third light emitting layer is not limited.
  • the emission layers may have a structure in which the first emission layer, the second emission layer, and the third emission layer are sequentially stacked on the first electrode, and the third emission layer, the second emission layer, and the first emission layer are sequentially stacked on the first electrode.
  • the first light emitting layer, the third light emitting layer and the second light emitting layer may be sequentially stacked on the first electrode, the second light emitting layer, the first light emitting layer and the first electrode on the first electrode It may have a structure in which the three light emitting layers are sequentially stacked.
  • the organic light emitting diode is disposed between the first electrode and the second electrode, and includes a blue light emitting material, a green light emitting material and a red light emitting material, or green light emitting light.
  • a first light emitting layer comprising a material and a yellow light emitting material;
  • a second light emitting layer including a blue light emitting material and a blue green light emitting material;
  • a third light emitting layer including a green light emitting material and a red light emitting material or including a green light emitting material and a yellow light emitting material.
  • the organic light emitting diode is provided between the first electrode and the second electrode, and includes a green light emitting material and a red light emitting material, or includes a green light emitting material and a yellow light emitting material.
  • the organic light emitting device is provided between the first electrode and the second electrode, the first light emitting layer comprising a blue light emitting material; A second light emitting layer including a blue light emitting material and a blue green light emitting material; And a third light emitting layer including a green light emitting material and a red light emitting material or including a green light emitting material and a yellow light emitting material.
  • the organic light emitting diode is provided between the first electrode and the second electrode, and includes a green light emitting material and a red light emitting material, or includes a green light emitting material and a yellow light emitting material.
  • the organic light emitting diode is provided between the first electrode and the second electrode, and includes a green light emitting material and a red light emitting material, or includes a green light emitting material and a yellow light emitting material.
  • the organic light emitting device is provided between the first electrode and the second electrode, the first light emitting layer comprising a green light emitting material and a red light emitting material; A second light emitting layer including a blue light emitting material and a blue green light emitting material; And a third light emitting layer including a green light emitting material and a red light emitting material.
  • the organic light emitting device is provided between the first electrode and the second electrode, the first light emitting layer comprising a green light emitting material and a red light emitting material; A second light emitting layer including a blue light emitting material and a blue green light emitting material; And a light emitting layer in which a third light emitting layer including a green light emitting material and a red light emitting material is sequentially stacked.
  • 3 illustrates a structure in which a light emitting layer is stacked in three layers, in which the second light emitting layer includes both a blue light emitting material and a blue green light emitting material, compared to a structure in which the second light emitting layer includes only a blue light emitting material.
  • the first light emitting layer, the second light emitting layer and the third light emitting layer are sequentially stacked from the first electrode.
  • the first light emitting layer and the third light emitting layer are phosphorescent light emitting layers, and the second light emitting layer is a fluorescent light emitting layer.
  • green and / or red phosphorescent dopants are used as the phosphorescent layer material.
  • the blue green phosphorescent dopant is applied.
  • the green-green phosphorescent dopant material is still short in life and low in productivity.
  • the process control is difficult to apply all of the green, green and red phosphorescent dopant to one phosphorescent layer.
  • the energy potential is shifted from blue green to green and green to red, so the blue green phosphorescent dopant should enter at the highest concentration, but the tactical As described above, such a configuration is difficult to realize because of poor service life characteristics. Therefore, according to the exemplary embodiment described above, an organic material layer including a blue green fluorescent dopant together with a blue fluorescent dopant is implemented.
  • Another embodiment of the present specification provides an illumination device including the organic light emitting device or the white organic light emitting device.
  • the lighting apparatus may implement a level similar to that of the SPD of the standard light source by using an organic light emitting device using a light emitting layer including a blue light emitting material and a blue green light emitting material. Accordingly, lighting devices according to some embodiments of the present disclosure may reach 90% or more of the color rendering index (CRI), more than 92% of the color rendering index (CRI), and 93% or more of the color rendering index (CRI). This is an increase of 5.8% or more, preferably 9% or more, compared to 85% of the color rendering index (CRI) of the conventional organic light emitting device lighting apparatus.
  • CRI color rendering index
  • CRI color rendering index
  • the spectral band method and the test color method are introduced, but the CIE has recommended the performance of the test color specimen method.
  • the wavelength band method is a method of indicating how different from a natural light (planckian radiator, daylight) by giving a constant weight to the spectral distribution of the light source for each wavelength range.
  • the method of using the test color specimen is CIE No.13.2 (TC-3.2) 1974.
  • the color coordinates of the color of several color samples under the reference light source (the perfect copy at the same temperature as the color temperature of the test light source).
  • the value is compared with the value of the color coordinates under the test light source and the calculation is made using the color difference (E).
  • the color rendering index was measured as a relative reflectance with respect to the standard sample of the comparison light source compared to the sunlight which is a standard light source.
  • lighting devices may reach up to 40% or more. This is an increase of about 82% compared with 22% of the conventional organic light emitting diode lighting device.
  • R9 represents the color rendering index for the standard sample corresponding to dark red in the standard sample for evaluating the color rendering index (CRI). Higher R9 means better color reproduction for red.
  • the lighting apparatus has a CCT (correlated color temperature) of more than 3,000K.
  • the organic light emitting diode may further include an additional organic material layer between the organic material layer including the light emitting material and the electrode, or between the organic material layers including the light emitting material.
  • the additional organic layer may be a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, an electron injection layer, a hole blocking layer or a buffer layer.
  • the organic light emitting device further includes one or more light emitting layers in addition to the light emitting layer including a blue light emitting material and a blue green light emitting material, and an intermediate electrode or a charge generating layer is included between the light emitting layers.
  • the intermediate electrode and the charge generating layer may each be composed of a single layer, or may be formed of a laminated structure of two or more layers.
  • the intermediate electrode may include one or two or more layers, and may include a conductive metal, a metal oxide, or a conductive polymer that may be used as a material of the first electrode or the second electrode.
  • the charge generating layer is composed of one or two or more layers, and may have a material and a structure known in the art.
  • the charge generation layer may have a structure in which an n-type organic compound layer and a p-type organic compound layer forming an NP junction with the n-type organic compound layer are sequentially stacked from an anode side.
  • An n-type doped organic compound layer may be further provided on the anode side of the n-type organic compound layer.
  • the organic light emitting device is an anode (ITO) / HIL / HTL 1 / HTL 2 / phosphor G + R / ETL / CGL / HIL / HTL 1 / HTL 2 / fluorescent B + BG / ETL / CGL / HIL / HTL 1 / HTL 2 / phosphorus G + R / ETL / EIL / cathode (Al or Ag).
  • ITO an anode
  • One of the first electrode and the second electrode is an anode, and the other is a cathode. These can be constructed using materials and techniques known in the art. If necessary, an auxiliary electrode may be additionally used.
  • the lighting device may be made of only the above-described organic light emitting device, it may be further provided with a frame or power connection provided to facilitate installation on the ceiling or wall of the building.
  • the emission wavelength is shown in FIG. 4 and FIG. 5 is shown respectively. 4 and 5, it can be seen that by the blue shift phenomenon of the emission wavelength of the blue-green fluorescent dopant, a material having a ⁇ max of 515 nm can compensate for light emission having a wavelength of 500 nm compared to a material having a ⁇ max of 500 nm. In addition, when using a material having a lambda max of 515 nm, there is a problem in that the blue emission peak decreases. Therefore, it can be seen that the application of a bluish green fluorescent dopant having an emission wavelength of 515 nm is preferable.
  • a first emission layer comprising 0.45 wt% red phosphorescent dopant and 10 wt% green phosphorescent dopant between the anode and the cathode;
  • a second light emitting layer doped with 5 wt% blue fluorescent dopant and 0.25 wt% blue green fluorescent dopant;
  • a third light emitting layer including 0.45% by weight of a red phosphorescent dopant and 10% by weight of a green phosphorescent dopant.
  • Example 2 When the second emission layer was formed, the same process as in Example 1 was performed except that only 5 wt% of the blue fluorescent dopant was doped without using the blue green fluorescent dopant.
  • the color rendering index of the organic light emitting diodes of Example 1 and Comparative Example 1 were measured and shown in Table 1 below.
  • the exemplary embodiment of the present specification by using a blue green light emitting material together with a blue light emitting material, it is possible to implement a light emission wavelength similar to the SPD of a standard light source, thereby improving the color rendering index.
  • a blue light emitting material and a blue green light emitting material as described above as compared with the case of using a single light emitting material, with the implementation of the desired light emission wavelength, the efficiency and / or life of the device is improved depending on the selection of the light emitting material You can expect even.

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  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention se rapporte à un dispositif électroluminescent organique et à un appareil d'éclairage comportant ce dernier. Selon un mode de réalisation de la présente invention, le dispositif électroluminescent organique est un dispositif électroluminescent organique qui comprend : une première électrode ; une seconde électrode ; et une ou plusieurs couches organiques agencées entre la première électrode et la seconde électrode, au moins une couche des couches organiques étant une couche électroluminescente comportant un premier matériau électroluminescent et un second matériau électroluminescent, la longueur d'onde de crête de luminescence maximale (λmax) du second matériau électroluminescent présentant un trou compris 40 et 80 nm par comparaison avec la longueur d'onde de crête de luminescence maximale (λmax) du premier matériau électroluminescent.
PCT/KR2015/000251 2014-01-10 2015-01-09 Dispositif électroluminescent organique et appareil d'éclairage comportant ce dernier WO2015105381A1 (fr)

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US15/110,550 US9887376B2 (en) 2014-01-10 2015-01-09 Organic light emitting device and lighting apparatus comprising the same
CN201580004058.6A CN105900256B (zh) 2014-01-10 2015-01-09 有机发光装置及包括该有机发光装置的照明设备
EP15735498.6A EP3093897B1 (fr) 2014-01-10 2015-01-09 Dispositif électroluminescent organique et appareil d'éclairage comportant ce dernier

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TW201539827A (zh) 2015-10-16
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CN105900256A (zh) 2016-08-24
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US9887376B2 (en) 2018-02-06
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